07%2e utran design process
TRANSCRIPT
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UTRAN NETWORK DESIGN
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1Presentation name - Date - 1
1
UMTSUTRAN
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2Presentation name - Date - 2
2
UMTS
UMTSUMTS(TRAFFIC)UMTS
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3Presentation name - Date - 3
3
UMTS 4 classes of services
9 Model of applications
Basic browsingMobile office
internet
Info Service & E-
Commerce
Interactive
Background
E-mail
Video Streaming Audio Streaming
Streaming
Video Conference Speech CS Data
Conversational
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4Presentation name - Date - 4
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UMTS(Interactive / Background)
Interactive Background
Pattern :
Delay Constraints :
Error protection :
Request Answer Content Download
No delay constraint
End-user = humanNeeds reactivity
End user = machineDelivery time insensitive
Data mostly downlink
Error correction by retransmission protocols (RLC ack mode, TCP)
Preserve Payload Content
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5Presentation name - Date - 5
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UMTS(Streaming / Conversational)
Streaming Conversational
DL continuous data Both way continuous data
Acceptable delay variation Real time strong constraint
No Error Protection
No time to correct error by retransmission
(RLC unack mode, UDP)
Relatively non bursty traffic
End User = HumanSensitive to delay variation (Jitter)
Pattern :
Delay Constraints :
Error protection :
End User = Machine
Buffer at the receiving end
,,.
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6Presentation name - Date - 66
UMTSUMTS(TRAFFIC)UMTS
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7Presentation name - Date - 77
()ON/ OFF model for PS application
Session description (ON / OFF model for packet arrival) :Nb of sessions / subs / BH
% of sessions with a file download
For each session : Nb of pages (or Email) Downlink Size of pages (or Email) in kBytes Size of file to download (kBytes)
ON period ONperiod
ON period
OFF period OFF period
Uplink
Downlink
One Session
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8Presentation name - Date - 88
()ON/ OFF ()Interactive: Basic browsing
Background: E-mail
1st E-mail
received
E-mail
Reading
Uplink
OFF
120 s
E-mail Reading+
Preparing answer
8 KB
8 KB
ON OFF
45 s
8 KB
45 s
8 KB
OFF
45 s
8 KBDownlink
2 nd E-mail
received
E-mail
Reading
Downlink
Uplink
7 s 7 s
0.4 kB 0.4 kB 0.4 kB0.4 kB
50 KB 50 KB 50 KB 50 KB
7 s
0.4 kB
50 KB
OFF OFF OFF OFF
7 s
Uplink
request
Page
downloading
Page
reading
One Session
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9Presentation name - Date - 99
() Duration of session
Application level (from user point of view)
Iu Connection duration = RAB duration
Example: Interactive Application (Ex. Basic Browsing)
RAB
Downlink
Uplink
7 s 7 s
0.4 kB 0.4 kB 0.4 kB
7 s
0.4 kB
50 KB 50 KB 50 KB 50 KB
7 s
0.4 kB
50 KB
7sec < Trelease
Iu Connection Duration = RAB duration
Session duration (user point of view)
A RAB is made of :
1 radio bearer UL1 radio bearer DL
1 Iu connection
oSignal. RANAP/SCCP +
o User plane
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10Presentation name - Date - 1010
: Activity Factor (1/2) Activity Factor Uplink and Downlink for PS services
Depends on ON/OFF model
Downlink AF = ON DL / (Iu Cnx duration), where Iu Cnx durationmeans Iu connection duration, this is the duration of the radiobearer.
Uplink AF = DL AF *(kbit/s UL)/ (kbit/s DL) * (data rate UL / Datarate DL)Assuming Page Request ON Uplink
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11Presentation name - Date - 1111
Idle
Downsized
RAB
Downlink
Uplink
7 s 7 s
0.4 kB 0.4 kB 0.4 kB
7 s
0.4 kB
50 KB 50 KB 50 KB 50 KB
7 s
0.4 kB
50 KB
7sec < Tdownsize
Iu Connection Duration = RAB duration
Session duration (user point of view)
: Activity Factor (2/2)
ON Downlink
Iu Connection
Duration
Session Duration
Ex of Interactive traffic (Basic Browsing) :
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12Presentation name - Date - 1212
1. Page/Email size (kBytes)
2. # of Page/Email (UL, DL)
3. Nb of Sessions/BH/attached subscriber
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13Presentation name - Date - 1313
4. % of sessions with attachment or file transfer
5. Attachment Size(kBytes)
6. Call Duration
,,
::
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14Presentation name - Date - 1414
()Throughput per sub
subErlAFratedataBearersubThroughput /..__/
3600
.#_..__/
SessiondurationSessionAFratedataBearersubThroughput
servicess
sThroughput
sThroughputsX)(
)()(
CS Traffic
PS Traffic
Traffic Mix
For example, Web browsing (DL):
Bearer_data_rate = 64K
AF = 45%
Session_duration = 85 s
#Session = 0.15 /BH
then, Throughput /sub = 64000*45%*(85*0.15)/3600 = 102 bit/s
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15Presentation name - Date - 1515
UMTSUMTS(TRAFFIC)UMTS
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16Presentation name - Date - 1616
()-UTRAN Mobility Link with the UTRAN:
Parameters
%SHO = 30% (with %SofterHO=40% and %intraRNCSHO=45% and %InterRNCSHO = 15%)
Nb of cells in SHO = 2
Average time between 2 HO = 10 sec
RNC3 RNC4RNC1
BS1 BS2 BS4 BS5
within the same BS =
- UTRAN : Softer Hand Over- CN : not seen
InterNodeB, within same RNC =
- UTRAN : Soft Hand Over
- CN : not seen
RNC2
BS3
Iur
InterNodeB, with 2 RNC (no Iur)=
- UTRAN : Hard HO
- CN : Hard HO
Impact CN
InterNodeB, with 2 RNC (Iur present)
=-UTRAN : Soft HO inter RNC
- CN : not seen
Macrodiversity and Handover :
Average number of Radio Links per user 1,3
Ratio of SofterHO / (SoftHO+SofterHO+interRNC SHO) 0,40
Ratio of InterRNC SHO / (SoftHO+SofterHO+interRNC SHO) 15%
Average time between 2 HO (s) 10,0
Soft HO:UTRANHard HO:UTRAN, CN
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17Presentation name - Date - 1717
()-PSPS Mobility Several types of RA updates : A) Intra SGSN RA updates ()
intra SGSN RA Update
B) Inter SGSN RA updates
Intra system (3G 3G) or Inter system (3G 2G)
Incoming or Outgoing inter SGSN RA Update
Mobile moves within the same SGSN(RA1 RA2)
Old-SGSN =
New-SGSN
RA1RA2
Old-SGSN New-SGSN
RA1 RA2
Mobile moves to a new SGSN(RA1 RA2)
Mobility ManagementPacket
SwitchedRouting Area update :
# of intra 3G-SGSN Routing Area Update 0,600
% of periodic RA update 70%
Inter SGSN RA Update outgoing : 3G--> 3G 0,040Inter SGSN RA Update outgoing : 2G--> 3G 0,010Inter SGSN RA Update incoming : 3G --> 3G 0,040Inter SGSN RA Update incoming : 3G --> 2G 0,010
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18Presentation name - Date - 1818
()-CSCS Mobility
User is not in communication : LA updates
A) Intra VLR LA updates (Periodic or not)
B) Inter VLR LA updates
User is in communication : Hand Over
Intra MSC intra MSC HO
Inter MSC HO intra system (3G 3G, 3G 2G) Incoming or Outgoing inter MSC HO
Subsequent HO :
Incoming (2G or 3G 3G 3G or 2G ) Outgoing (3G 3G or 2G 3G or 2G)
Mobile moves within the same VLR(LA1 LA2)
Old-VLR =
New-VLR
LA1 LA2
Old-VLRNew-VLR
LA1 LA2
Mobile moves to a new VLR(LA1 LA2)
MSC1 MSC2
Mobile moves to a new MSC while in call
- MSC1 : outgoing HO
- MSC2 : Incoming HOLand
MSC1 MSC2
Mobile moves to a new MSC while in call
- MSC1 : outgoing subsequent HO
- MSC3 : incoming subsequent HOLand
MSC3
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19Presentation name - Date - 1919
..
Traffic
Traffic per attached subs during
BH
Signaling Subscribers ratio
Detach, Attach, Active Sub ratio
Session Management
PDP context related
Mobility Management
Routing Area update
Location Area update
Hand OversCall Distribution Ratio
M-L, L-M, M-M
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20Presentation name - Date - 2020
UMTSUTRANUMTSUTRANIBTSIubNodeBRNC
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21Presentation name - Date - 2121
UMTSUTRANUMTSUTRANIBTSIubNodeBRNC
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22Presentation name - Date - 2222
UMTS
,,,,
,
UnivityUnivity iBTSUnivity iBTS Univity iBTS
UnivityRNC
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23Presentation name - Date - 2323
UMTSUTRANUMTSUTRANBTSIubNodeBRNC
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24Presentation name - Date - 2424
#BTS, BTS type
Max Kbit/s per BTS
Call profile Coverage Radio conditions#carriers
Environment definitionEb/No target, BLER per service
SHO parameters...
Km2
per environment
Erlang per CS service
Kbit/s per PS service
#E1 Iub leaving the BTS
#STM1/E1 Iub
Kbit/s per RNC
Existing/forecasted
infrastructureTransmission
BLER,
SHOp
arameters
RNC dimensioning
Iub links dimensioning
Backhaul dimensioning
UTRAN
BTS dimensioning
Iu+Iur dimensioning
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25Presentation name - Date - 2525
Class (Conversational/Streming/Interactive/Background)Bearer data rate (UL and DL)
BLER
Soft hard over ratio# Cells in macro diversity
#carriers
Environment definitionEb/No target
RF linkbudget.
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26Presentation name - Date - 2626
#BTS, BTS type
Max Kbit/s per BTS
Call profile Coverage Radio conditions#carriers
Environment definitionEb/No target, BLER per service
SHO parameters...
Km2
per environment
Erlang per CS service
Kbit/s per PS service
#E1 Iub leaving the BS
#STM1/E1 Iub
Kbit/s per RNC
Existing/forecasted
infrastructureTransmission
BLER,
SHOp
arameters
RNC dimensioning
BTS Iub links dimensioning
Backhaul dimensioning
UTRAN
BTS dimensioning
Iu+Iur dimensioning
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27Presentation name - Date - 2727
UMTSUTRANUMTSUTRANBTSIubNodeBRNC
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28Presentation name - Date - 2828
Univity iBTS
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29Presentation name - Date - 2929
Univity iBTS
Network
Interface
CCM (0)CCM (0)
SYNC (0)
(option)
TRM
TRM
TRM
/
CEM
CEM
CEM
CEM
CEM
CEM
WCDMA
CE
CESF
PA
PA
PA
6
6
6
f2f1,f2,f3
D
D
D
D
D
D
PA
PA
PA
f3
f1,f2,f3
f1
30W
45W
-
f2
f1,f2,f3
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30Presentation name - Date - 3030
UNIVITY iBTS CEM
CEM
N+1
CCM,
1+1
TRM GPSAMGPS MCPA DDM
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31Presentation name - Date - 3131
iBTS
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32Presentation name - Date - 3232
iBTS: Xa-b-c-d (eg.S3-1-128-3 STSR1)
X = BTS sectorisation Possible values : O (Omni) or S (Sectorial)
a = number of Sectors
Possible values = 1, 2, 3 or 6
b = number of RF Carriers Possible values = 1, 2, 3
c = number of spreading codes
Possible values = 64, 128 and multiples
d = number of Power Amplifiers
Possible values = 1, 2, 3 or 6
TD = Transmit Diversity (optional)
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33Presentation name - Date - 3333
CEM-CEMRF
CEM64 CEM128
RAB UL/DL kbps + SRB UL SF DL SFNumber of
links
Number of
links
CE per
link
Conversational/Speech
CS RAB 12.2/12.2 kbps + SRB 3.4 kbps 1x64 1x128 64 128 1
Conversational/Unknown
CS RAB 64/64 kbps + SRB 3.4 kbps 1x16 1x32 16 32 4
Streaming/Unknown
CS RAB 14.4/14.4 kbps + SRB 3.4 kbps 1x64 1x128 64 128 1
Interactive or Background
PS RAB 32/8 kbps + SRB 3,4 kbps 1x32 1x128 32 64 2
PS RAB 64/64 kbps + SRB 3,4 kbps 1x16 1x32 16 32 4
PS RAB 64/128 kbps + SRB 3,4 kbps 1x16 1x16 16 32 4
PS RAB 64/384 kbps + SRB 3,4 kbps 1x16 1x8 8 16 8
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34Presentation name - Date - 3434
BTS
W-CDMA trade-off
(4)()
(micro, indoor, ..)
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35Presentation name - Date - 3535
BTS Step1.
Based on the Link Budget (eg. Cell Radius per environment) Increase the number of sites if dimensioning is capacity-based
Step2.NodeB UL Load Radio UL capacity
PA Radio DL capacity
TRM Codes DL capacity
CEM CEM UL/DL capacity
Step3.BTS
NodeB
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Presentation name - Date - 3636
iBTSCall profile Radio conditions
#carriersEnvironment definition (TU50..)
Eb/No target, BLER per service
SHO parameters...
Erlang per CS service
Kbit/s per PS service
Traffic mix x(s)
Radio UL/DL
capacity per service
CEM UL/DL
capacity per service
Hardware
limitation
Service
definition
Carrier DL
capacity per service
BTS capacity in UL and DL
BTSCEM
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Presentation name - Date - 3737
UMTSUTRANUMTSUTRANIBTSIubNodeBRNC
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Presentation name - Date - 3838
#BTS, BTS type
Max Kbit/s per BTS
Call profile Coverage Radio conditions#carriers
Environment definition (TU50..)Eb/No target, BLER per service
SHO parameters...
Km2
per environment
Erlang per CS service
Kbit/s per PS service
#E1 Iub leaving the BTS
#STM1/E1 Iub
Kbit/s per RNC
Existing/forecasted
infrastructureGSM/GPRSTransmission
BLER,
SHOpa
rameters
RNC dimensioning
BTS Iub links dimensioning
Backhaul dimensioning
UTRAN
BTS dimensioning
Iu+Iur dimensioning
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Presentation name - Date - 3939
Iub
Signalliing + OaM
Iub main traffic
Iub diversity traffic
=f(BTS average capacity, Headers+BLER)
=f(SHO parameters)
Iub
=f(Signalling/OaM)
Node B(BTS) RNC
Iub
Iub_traffic = Iub_traffic_main + Iub_traffic_diversity + Iub_Sig_OaM
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Presentation name - Date - 4040
Soft Handover
RNC RNC
Node B
UE
Core Network
InterNodeB
SHO
InterRNC
SHO
Case 1 : Softer
handover
Case 2 : Soft handover
2Iub
Case 3 : Inter RNC soft
Handover
2Iub
1Iur
Iub_traffic_diversity =
Iub_traffic_main x %SHO_Iub
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Presentation name - Date - 4141
Main
+diversity
+OAMTraffic main
Iub Links
(E1s)Physical layer
Iub Interface Dimensioning
part for Macro DiversityNote: depends on traffic mix, SHO parameters
part for Signalling+OaM
30% Eng margin
Protocol headers + radio retransmissions
Note: depends on the traffic mix, BLER and service definition
Iub
RLCMAC-d
ATM
PHY
PHY
Dch FP
AAL2
Headers + Radio
retransmissions impact
Note: depends on service definition,
traffic mix and BLER
Traffic offered
by the BS
#Iub_linkIubE1,
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Presentation name - Date - 4242
UMTSUTRANUMTSUTRANIBTSIubNodeBRNC
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Presentation name - Date - 4343
NodeB-RNC
1. (PP7K)---BTS.
2. E1---MUX(: TN-1X)
N d B RNC
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Presentation name - Date - 4444
NodeB-RNC
RNC
-
-
NodeBN2
UMTS IBTS1 Fract E1
15 TS
E1E1
UMTS IBTS
1 Fract E1
15 TS
NodeB
N1
NodeBE1.
3. Drop&Insert E1
..
#1 #2#1
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Presentation name - Date - 4545
Iub
:UMTS.
PP7KConcentration site
E1 Iub STM1 Iub
RNC site
PP7K:
BS
(PP7K)
20% eng.
margin
Traffic
offered bythe BS
BSE1
RNC
STM-1
Average traffic handled by
the BS :
Main + Diversity + Signalling
+ OaM
Layer 1+ radio
retransmissions30%
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!!!